Operation Sackville

Operation Sackville (21-25 July 1951) was a United Nations military operation of the Korean War that saw the combined forces of South Korea, the United Kingdom, and United States launch an offensive against North Korean forces in a gap that separated UN-occupied Pyongyang from the other UN forces south of the Korean DMZ. Following Operation William, the Korean People's Army forces in the gap were weakened, and the UN coalition forces pushed against the North Koreans.

Operation
On 21 July 1951, following the Royal Air Force's tenderization of the Korean People's Army forces in the Sariwon gap, several divisions of United Nations troops launched an offensive against the KPA troops. The offensive was spearheaded by a large British contingent, and the British command nicknamed it "Operation Sackville" after a noble family in Dorset. The British, assisted by large South Korean and smaller American forces, made a major assault against North Korean troops in the pocket, and the offensive took four days to complete due to some stiff resistance by the North Koreans. On 25 July 1951, the offensive ended in a UN victory as the North Korean forces were destroyed.